function main() {
	let oldOutsideDs =pe.Dataset('world', 20000101000000);
	let insideDs = oldOutsideDs.clone();
	insideDs.addConst(50,0);
	let henan=pe.geomById('henansheng.geojson');
	let resultDs=pe.mergeByGeom(henan, insideDs, oldOutsideDs);
	return resultDs;
}